iMac Pro and ISIS 5500 not playing well together

We are currently running 4.7.10 ISIS and use the NEXIS 7.6 client. When we upgraded our older "trash can" Mac Pros to High Sierra - no problem. We got a couple iMac Pros - transferred the account from the "can" Mac Pro to the new iMac Pro and could not connect to the ISIS server. We installed the latest version of the NEXIS client and now we can connect, but are unable to copy files from the ISIS to our iMac Pro - we get a -36 error (cannot read/write) and also, when we try to lay back a video - it stalls 5 or 10 seconds in. Anyone else experience this?

Re: iMac Pro and ISIS 5500 not playing well together

MC2018.4 - actually, last test was after only installing Nexis 7.11.08 and QT7 - not othe softeware installed.

iMac Pro automatically uppgades to 10.13.4 when I do clean install.

Nexis 2018.3 does not help - same behaviour.

However a Mac Mini running the same OS but NEXIS 7.11.08 works fine.

hm ...I don’t recall having to allow the KEXT in security preferences when originally installing on the iMac Pros ... and definitely not after uninstalling the NEXIS client driver in order to upgrade or down grade between versions.

I’l try to upgrade it to 2018-3 and if that does not work do a fresh os clean install from scratch.

Re: iMac Pro and ISIS 5500 not playing well together

Interestingly, I can copy files from my iMac Pro to the ISIS, just can't copy from the ISIS or play back the files without stalling. All our regular iMacs and Mac Pros perform just fine, only the two recent iMac Pros have the problem.